Though they try to hide it from him, 10-year-old Ollie can sense that his parents' marriage is crumbling, and, blaming himself, he resolves to be on his best behavior to fix the situation. But when things don't improve, it's time to change tactics. Since being a perfect angel hasn't solved the problem, Ollie decides to resort to the one thing he hasn't tried yet -- being very, very bad. Joseph Friend, Robson Green and Maggie O'Neill star.